Please i need Urgent assistance....I have a 2002 Toyota Highlander and its giving me headaches. When the car is Park Mode and the Engine is ON, it sounds so sweet and calm. But once its engaged on Drive mode, and you try to move the car it will make a pop pop sound and jerk on first movement from the air filter box. Once it succeeds in moving, it will accelerate well until you stop and same problem will surface again.

The plugs are firing well.

I scanned with Torque and i got fault code P0758 - Generic (Type: Powertrain - Transmission -ISO/SAE Controlled) (Description: Shift Solenoid "B" Electrical), P0758 - GM (Type: Powertrain-Transmission -ISO/SAE Controlled) (Description: Transmission 2-3 Shift Solenoid Electrical Fault) (Cause: P0560) and P1155 - Toyota (Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled) (Description Air fuel sensor) California - RH front - heater circuit malfunction (Cause: Wiring, air fuel ratio sensor, ECM)

The fuel pump is running continuously even when the ignition is off, unless when the battery head is off.

i was browsing the internet and came across this http://www.toyotanation.com/forum/83-1st-generation-2001-2007/286474-2002-highlander-transmission-codes.html i have been trying to explain to the mechanic, but can't get him to understand over the phone. I believe it is because i am not knowledgeable on this.He is currently trying to check the plug coils and nozzle, i called him and advised him to work on the timing as someone advised, he did and said its ok.

Don't know what else to do, my Mechanic is good at what he does but this one is kinda much for him to handle.

Please I need urgent assistance.

Checking the engine sitting and also check the shaft cup inside the gear box